Patent US3540852A successfully refreshed from Google Patents.
US3540852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effluent sampling method and apparatus for a gas chromatographic procedure
Assignee: GORDON S LACY
•
Filing: 1968-09-30
•
Granted: 1970-11-17
•
Expires: 1988-09-30
Abstract
No abstract record available.
Inventors
- 👤 Phillip Gorne
- 👤 Steven H Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:24
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/80; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25875
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2001581A
Cited
GB509288A
Cited
US2940448A
Cited
US3168378A
Cited
US3171722A
Cited
US3173762A
Cited
US3205711A
Cited
US3374660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |